Microbe-metal-interactions for the biotechnological treatment of metal-containing solid waste--颗粒学报PARTICUOLOGY

Brandl, H., & Faramarzi, M. A. (2006). Microbe-metal-interactions for the biotechnological treatment of metal-containing solid waste. China Particuology, 4(2), 93–97. https://doi.org/10.1016/S1672-2515(07)60244-9

Microbe-metal-interactions for the biotechnological treatment of metal-containing solid waste

Helmut Brandl ^a *, Mohammad A. Faramarzi ^b

a Institute of Environmental Sciences, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
b Faculty of Pharmacy, Department of Pharmaceutical Biotechnology, Tehran University of Medical Sciences, Tehran 14174, Iran

10.1016/S1672-2515(07)60244-9

Volume 4, Issue 2, April 2006, Pages 93-97

Received 25 January 2006, Accepted 29 March 2006, Available online 27 November 2007.

E-mail: hbrandl@uwinst.unizh.ch

Highlights

Abstract

In nature, microbes are involved in weathering of rocks, in mobilization of metals from minerals, and in metal precipitation and deposition. These microbiological principles and processes can be adapted to treat particulate solid wastes. Especially the microbiological solubilization of metals from solid minerals (termed bioleaching) to obtain metal values is a well-known technique in the mining industry. We focus here on non-mining mineral wastes to demonstrate the applicability of mining-based technologies for the treatment of metal-containing solid wastes. In the case study presented, microbial metal mobilization from particulate fly ash (originating from municipal solid waste incineration) by Acidithiobacilli resulted in cadmium, copper, and zinc mobilization of >80%, whereas lead, chromium, and nickel were mobilized by 2, 11 and 32%, respectively. In addition, the potential of HCN-forming bacteria (Chromobacterium violaceum, Pseudomonas fluorescens) was investigated to mobilize metals when grown in the presence of solid materials (e.g., copper-containing ores, electronic scrap, spent automobile catalytic converters). C. violaceum was found capable of mobilizing nickel as tetracyanonickelate from fine-grained nickel powder. Gold was microbially solubilized as dicyanoaurate from electronic waste. Additionally, cyanide-complexed copper was detected during biological treatment of shredded printed circuit-board scraps. Water-soluble copper and platinum cyanide were also detected during the treatment of spent automobile catalytic converters.

Graphical abstract

Keywords

biohydrometallurgy; bioleaching; solid waste; metal recovery; cyanogens

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